Bag tying machine



Sept. 8, l1931. H. a. FouLDER BAG TYINGMACHINE Filed Oct. 10. 1929 2 Sheets-Sheet 1 m 1 N HU I. :z WN

u, KQ@ o .nu

Sept- 8, 1931. H. B. FQULDER 1,822,137

BAG TYING MACHINE Filed oct. 1o, 1929 2 sheets-'shea 2 INVENTOR 'rToRNEY Patented Sept. 8, 1931 o i p i i UNITED STATES PATENT orrics HENRY B. FOULDER/OF GLENIBROOK, CONNECTICUT BAG TYING MAoHiNn Application filed October 10, 1929, `Serial No. 398,589.

This invention relates tov bag tying ma- In accordance with the present invention, chines and more particularly relates to matheele'ments which grip the end of the nnehines for, fastening wire ties about the pucksevered wire and reciprocate to first pull out ered necks of bags to tie their. mouths closed, a length and then after this length has been and more speciically relates to an improvesevered, return to grip the newly exposed l5' ment in the bag tying machinedisclosed and end of the wire coming from the reel, are so claimed in my copending application filed arranged and organized that this reciproca- December 14, 1928, Serial No. 326,125. tion will take place continuously, but the eX- The machine disclosed in my said prior apposed end of the wire con'iing from the reel plication includes a turn-table adapted to will not be gripped unless therc'is a bag in 69 bring bags successively into position to be a predetermined position on thehun-table tied by the machine, and mechanismVV for which continues even intermittent rotation. periodically drawing out av length of wire The gripper is closed to grip a wire by a fromareel, cuttingalength therefrom, bendmember which is normally moved on the ing this length into U-sha-pe with looped ends, gripper before the gripper is moved in wire placing the U-shaped length about the neck feeding direction. d Means are provided 'for of the bag positioned to be tied and twisting normally preventing movement o' `this niemthe ends of the tie together to fasten Closed ber to close the gripper until-after the gripper the mouth of the bag. The turn-table and has been moved outwardly bey-ond the eX- 2 the various mechanisms of the machine are posed end of the wire which would otherdriven in synchronism from a main shaft wise be gripped. Means are associated with which is connected to a constantly rotating the turn-table wherebywheneverr L bag is in power shaft by means of a clutch which auto` a `predetermined relative position on the matically disengages after each complete turn-table, an adjustment is made whereby I,

revolution of the main driving shaft. Means the gripper is iirst closed to grip the exposed 7"' are provided in said prior machine whereby end ofthe length of wire and then advanced the placement of a bag in a certainrelative to pull out a length thereof. position in the turn-table cause this clutch to My invention accordingly lconsists in the engageand carry the machine through one features ofconstruction, combinations oi" elecycle of operation. l i ments and arrangements of parts, which will The principal object of the present invenbe more clearly described hereinafter and the tion is to improve upon the said prior mascope of the application of which will be chine particularly in the following respects: exemplified in the claims that foilow.

. First, to permit continuous rotation of the In order that al clearerunderstanding of main driving shaft, while at the same time, my invention may be had, attention is hereby preventing the feeding of a. wirey or tie unless directed to the accompanying drawings a bag is in a predetermined relative position vforming a part of this application and illuson the turn-table. Second, to eliminate the trating certain possible embodiments of my necessity of a clutch intermediate the source invention and in which:

4 of power and the driving shaftand the mech- Fig. 1 is a plan view of my improved bag 'ml anism for causing this clutch to engage in retying machine, including the turn-table; sponse to the presence of a bag .or bags on the Fig.' 2 is an enlarged view of a portion of turn-table. Third, to simplify the constructhe machine partly in section, and is taken tion and to make the operation of the machine approximately on .the line 2 2 oi' Fig. 1;

5 more eiiicient and smooth and less expensive Fig. 3 is a similar view of a part of a mechw and to make the machine mOre durable and anism shown in Fig'. 2, but in diilerent state able to withstand hard usage. of adj ust-ment;

Other objects of this invention will be in Fig.. 4 is a view similar to Fig. 3 but showpart obvious and in part pointed out hereining the parts in still another state of adjust- 5 after. ment.

ino

Similar reference characters refer to similar parts throughout the several views of the drawings.

Referring to the drawings, the machine is similar to that disclosed in my said prior application. It includes a suitable table or framework 1 which supports the various parts. There is a main drive shaft 2, supported in journals 3, which drives the various mechanisms of the machine. A turntable 4 having notched means 5 to receive and hold bags at th-eir necks is driven by shaft 2 through beveled gears 6, shaft 7 carried in journals 8, chain 9 and associated mechanism, as disclosed in my said prior application. The spindle 10 associated with the turn-table is also reciprocated and rotated by mechanism connected with chain 9 as disclosed in my prior application. The wire 11 from the reel extends through a suitable aperture 12 in a block 13 and through a collar 14 which is periodically reciprocated by means of an abutting spring 15 and a rod 16, which is actuated by a pivoted lever 17 which is rocked by a roller 18 carried on a bar 19 which is connected to and moves with a block 20, on which the wire gripping jaws 21 and 22 are carried. Block 2O is reciprocated by means of a shaft 23 which is connected to an oscillating lever 24. Lever 24 is oscillated by having a sliding connection as at 25, with a gear 26 which meshes with a gear 27 fixed to shaft 7.

The jaws 21, 22 are adapted to grip the end of the wire 11 when protruding from retracted collar 14 and then block 2O and these jaws are moved outwardly to place the length of wire above the end looping pins 28 and in` position for being gripped by the forming jaws 29. Vhen extended, the length of wire is cut off' at the end of the projected collar 14 by means of a knife fixed to the rod 30 which is reciprocated by means of a cam 31 which is connected thereto through cam roller 32 and shafts 33 and 34.

The end looping pins 28 are raised into engagement with the extended wire by means of a cam 35 .and shaft 36. These forming pins are turned by mechanism which includes caln 37 and shaft 38. Means for reciprocating the forming jaws include a shaft 39 and cam40, which engages roller 41 for retracting the jaws to pull the wire into U-shape between the forming pins 42 and a cam 43, which engages a roller 44 for moving the 'jaws into position to grip a wire disposed across the looping pins 28 and for also advancing the formed wire to the turn-table and about the bag neck and into engagement with the twisting spindle. The mechanism for opening and closing the aws 29 includes shaft 45 and cam 46. Cams 31, 35, 37, 40, 43 and 46 are fixed to the driving shaft 2 for rotation therewith.

The mechanism just described is included in the machine disclosed and shown in my said prior application.

As in my prior application, the actuating bar 23 is connected with a member 47 which is pivoted to the gripper head 20 as at 48, member 47 having a shoulder 49 which, when the bar 23 is moved to carry the gripper outwardly, first forces the shoulder 49 upon the extension 50 of the movable jaw 22 to close the gripper and engage the end of the wire projecting from sleeve 14 between the jaws. On further movement of bar 23, the gripper is moved outwardly to carry the gripped wire with it.

In accordance with the present invention, the jaw closing member 49 is provided with a heel or extension 51 and a slidable detent or v latch bar 52 is mounted in a suitable support 53, and so placed that when in raised or operative position, it engages behind the heel 51 of member 49and prevents this member from depressing and closing the jaw 22 of the gripper until the gripper has been advanced beyond the projecting end of the wire 11. A

suitable spring 54 encircling a stem 55 of latch 52 normally holds latch 42 raised so that the protruding wire will not be gripped and eX- tended during continuous reciprocation of the gripper unless detent 52 is withdrawn so that it will not be engaged by the heel 51 of member 47 when bar 23 is moved to advance the gripper.

The present invention includes a provision of mechanism whereby the detent 52 will be withdrawn so that the wire will be gripped and fed and formed and applied to a bag wheneverv a bag is in a predetermined relative position on the turn-table. This mechanism includes a bell crank lever 56 pivoted on a bracket or standard 57 adjacent the turntable. One end of lever 56 extends beneath the turn-table, preferably in position to be engaged and'moved with bags supported in the notches of the turn-table. This lever is adapted to be moved each time there is a bag in a notch which passes over this lever. After the lever has been displaced by a bag, it is adapted to move automatically back into initial position. The other arm of lever 56 is connected by means of a link 58 to one arm 59 on a small bell crank lever which is pivoted to the machine as at 60. The other end 61 of this lever bears on a pin 62 fixed to the sliding latch 52 so that when and as the bell crank lever 56 is pivoted by a bag positioned in a turn-table notch which is passing this lever, the small bell crank lever 59, 61, will be rocked to retract latch 52 and allow movement of actuating rod 23 to first pivot member 47 to close the jaws 21, 22 upon the exposed end of the wire and then to move the gripper 2O and the wire gripped thereby outwardly, whereupon other mechanism severs, forms and applies the tie to the bag in the turnftable which actuated bell crank lever 56 to retract latch 52 and allow the wire to be gripped.

In Fig. 2, the bars are shown in fully retracted position, the bar 23 being about to start to move outwardly. In this position, the exposed end of the wire ll is entered between the jaws 21 and 22 which are normally open. On initial movement of bar 23 outwardly, this bar tends to swing lever 47 against the projection 5() of movable jaw 22 to grip the wire, but is prevented from so moving member 47 by normally raised latch 52 which abuts the heel 51 of member 47 unt-il the gripper 20 has been advanced so far, for instance, to the extent shown in Fig. 4, that it is beyond the end of the wire l1 and cannot grip it when the member 47 is advanced out of engagement with the latch 52 and allowed to pivot to depress the jaw 22.

However, if due to the actuating of bell crank lever 56, due to the presence of a bag in the turn-table, the latch 52 is in depressed position when the bar 23 starts to move outwardly, the initial movement of bar 23 will first cause the member 47 to pivot to close the jaws 21, 22 on the exposed end of the wire, as shown in Fig. 3, and then on further movement of bar 23 outwardly, the gripper 2O will be moved while the member' 47 is held depressed on the jaw 22 to cause the jaws to hold their grip on the wire. On return movement, bar 23 rst rocks member 47 in the reverse direction to open the aws 2l, 22 and then to restore the gripper to original position.

To prevent the wire ll from sliding or being pushed back through the passage l2, a clamp member 63 pivoted on a bracket 64, as at 65, has a knife edge 66 which presses the wire 1l against a surface of the bracket 64. This knife edge 66 is so formed and dis posed that it permits the wire 1l to be drawn outwardly through the passage l2 but locks the wire against movementV in the opposite direction.

Preferably the driving shaft 2 is rotated continuously, and to this end it may be provided with a suitable gear or pulley wheel 67, which `is adapted to be connected to a suitable source of power, which, however, is not shown.

From the above, it will be readily apparent that the machine is adapted for continuous operation irrespective of the presence or absence of bags in the turn-table, but that no length of wire will be severed or formed into a tie or fed to the turn-table or engaged by the twlsting spindle unless a bag is present in the proper place on the turn-table to receive and be tied with a tie. Furthermore, so long as there is a supply of wire in the machine each time a bag is brought by the turn-table into position to be tied, a length of wire will have been severed from the reel and formed into a tie and will be applied and twisted about the neck of that particular bag.

As many changes can be made in the above construction and as many widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense.

What I claim is l. In a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to advance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advance the gripped wire, and controlling means for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, said controlling means being adjustable to permit normal operation of said actuating means.

2. In a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to advance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advance the gripped wire, controlling means for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, said controlling` means being adjustable to permit normal operation of said actuating means, and means responsive tothe presence in the machine of bags to be tied for controlling the adjustment of said controlling means.

3. In a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to ad- Vance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advancethe gripped wire, controlling means for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, said controlling means being adjustable to permit normal operation of said actuating means, a member adapted to receive bags to be tied, and means responsive to reception of a bag by said member for controlling the adjustment of said controlling means.

4. In a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to ad- Vance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advance the gripped wire, controlling means for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, said controlling means being adjustable to permit normal operation of said actuating means, a turn-table adapted to receive bags to be tied, and means responsive to the presence and absence of bags in a predetermined relative position on the turn-table for controlling the adjustment of said controlling means.

5. ln a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to advance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advance a gripped wire, control means, including an adjustable detent adapted to engage said actuating` means, for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, and means for retracting said detent to release said actuating means for normal operation.

6. n a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to advance a gripped wire, actuating means normally operable to first adjust said means to grip a wire and then to move said means to advance a gripped wire, control means, including an adjustable detent adapted to engage said actuating means, for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, and means responsive to the presence of a bag in a predetermined position in the machine for retracting said detent to release said actuating means for normal operation.

7. In a bag tying machine of the character described, in combination, feeding means adjustable to grip a wire and movable to advance a gripped wire, actuating means normally operable to first adjust said means to `grip a wire and then to move said means to advance a gripped wire, control means, including an adjustable detent adapted to engage. said actuating means, for preventing said actuating means from adjusting said feeding means to grip a wire until after advancement of said feeding means a predetermined distance, a turn-table adapted to carry ha into position to be tied, means for turning the turn-table, and means including a member adjacent the turn-table and adapted to be engaged by bags carried by the turntable through a predetermined arc, for retracting said detent to release said actuating means for normal operation.

8. In a bag tying machine of the character described, in combination, a wire gripper, including normally open jaws, actuating means normally operating to close said jaws and then to advance the gripper as a whole, coacting control means normally preventing the closing of said jaws until said gripper has been advanced a predetermined distance in a certain direction, and means for adjusting said control means into inoperative position to permit normal operation of said actuating means.

9. In a bag tying machine of the character described, in combination, a wire gripper adapted to be reciprocated as a whole, and including a stationary jaw and a co-acting movable jaw, means normally holding said jaws open, a member pivoted to said gripper an-d adapted to engage and close the movable jaw upon the stationary jaw, a rod pivoted to the gripper and normally adapted, on initial movement in one direction, to pivot said member on the gripper to close the jaws and then to move the gripper as a whole, and means including' an adjustable detent positioned to be engaged by said member, for preventing said member from pivoting to close the jaws until said gripper has been moved as a whole a predetermined distance.

l0. In a bag tying machine of the character described, in combination, a movable wire gripper including a head having a relatively stationary grip member and a co-acting relatively movable grip member, an actuating member pivoted on said head and adapted to engage and to move the movable grip member to close the gripper, means for reciprocating the wire gripper as a whole, said means including a reciprocable bar pivotally connected with said actuating member and tending, on movement in one direction, to pivot said actuating member to close the gripper before moving the gripper as a whole, an extension on said actuating member, and a detent therefor positioned to be engaged by said extension to prevent said actuating member from pivoting on said head to close the gripper until the gripper as a whole has been moved outwardly a predetermined distance, and means for withdrawing said detent to allow said bar, on movement in said direction, to pivot said actuating member to close the gripper before effecting movement of the gripper as a whole.

ll. In a bag tying machine of the character described, in combination, wire gripping and feeding means, including a gripper adjustable to grip a wire and adapted to be reciprocated, actuating means for continuously reciprocating the gripper and tending to adjust the gripper to grip a wire in advance of each movement of the gripper in one direction, and control means normally preventing said actuating means from adjusting the gripper to grip a. tie until the gripper has been moved a predetermined distance in said direction, said control means being responsive to a bag in the machine to be tied to permit said actuating means to adjust the leo gripper to grip a tie beiiore moving the gripper in said direction.

12. In a bag tying machine of the character described, in combination, Wire gripping and feeding means, including a gripper adj ustable to grip a Wire and adapted to be reciprocated, actuating means for continuously reciprocating the gripper and tending to adjust the gripper to grip a Wire in advance of each movement of the gripper in one direction, control means normally preventing said actuating means from adjusting the gripper to grip a tie until the gripper has been moved a predetermined distance in said di rection, said control means being responsive to a bag in the machine to be tied to permit said actuating means to adjust the gripper to grip a tie before moving the gripper in said direction, and means for positioning the end oi a Wire in position to be gripped by the gripper in advance of movement in said direction, whereby a length of Wire is fed only each time said control means responds to the presence of a bag in the machine.

This specification signed this 8th day of October, 1929.

HENRY B. FOULDER. 

